Hi,
Thanks for posting in Microsoft MECM Q&A forum.
1, Firstly, it's recommended to check the locationservices.log on the client to make sure that the correct SUP point is detected by the client, else make sure that the client is correctly reporting to the SCCM server and that the software update is enabled.
2, When the policy agent triggers the software update deployment cycle, the scan result is compared with the catalogue and then it downloads only the required updates and install on schedule. We can check the updatestore.log, updatedeploymemt.log and windowsupdate.log for more details.
For more logs about windows update troubleshooting, please refer to below articles:
Track the software update deployment process in Configuration Manager
Troubleshooting SCCM Part III ...Software Updates
Hope it helps. Thanks for your time.
Best regards,
Simon
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.